4704846c5605552a2573aeb62f176630fd2ba5498457420c3fb36a27cae6800f

Analysis

max time kernel
147s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
01-10-2024 11:59

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General

Target

$PLUGINSDIR/gcinst.exe
Size

1.3MB
MD5

6ec7094e0756a6698b33e1420fa614d1
SHA1

717a3065334c0851d908d3a9c03e9fe98f577914
SHA256

5690d7de821e2d10210b6ae5f9a490934bc77a3005ee72c56eed00fea63bf4ce
SHA512

785be9a41b37265071eaf5d2fe5a9c5a7c780764eae33ede2d71099d527e1b17068951a758588a57e1b29a2a898196613c5751bc380b94fcf8cb84b8bc90f84c
SSDEEP

24576:kUZGvjjCcQiydy+2cB3Q3gmsSHXd34cyE7jQ9gHKM8OHdp:xUPCcQjx2cB3Q3zFjQ9aKM8cdp

Score

4^/10

discovery evasion trojan

Malware Config

Signatures

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Google\GoogleUpdateSetup.exe	gcinst.exe

Drops file in Windows directory 64 IoCs

description	ioc	Process
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_ta.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_gu.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_hi.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_ko.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\GoogleUpdateOnDemand.exe	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\psmachine.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\psuser.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\psuser_64.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_am.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_sk.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_zh-CN.dll	GoogleUpdateSetup.exe
File opened for modification	C:\Windows\SystemTemp\GUM926D.tmp\GoogleUpdateSetup.exe	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_kn.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_mr.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_ur.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\GoogleCrashHandler.exe	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdate.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_es.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_et.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_hr.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_vi.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_fi.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_iw.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_pt-BR.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_th.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\psmachine_64.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_ar.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_fa.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_it.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_da.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_fr.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_te.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_cs.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_nl.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_ru.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_sl.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_sv.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_el.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_en.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_zh-TW.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_sw.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\GoogleUpdateSetup.exe	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\GoogleCrashHandler64.exe	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_ja.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_ms.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_pl.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_pt-PT.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_fil.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_id.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_lv.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_ml.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_ro.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\GoogleUpdate.exe	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\GoogleUpdateBroker.exe	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\GoogleUpdateCore.exe	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_en-GB.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_es-419.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_tr.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\GoogleUpdateComRegisterShell64.exe	GoogleUpdateSetup.exe
File opened for modification	C:\Windows\SystemTemp\GUT926E.tmp	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_ca.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_de.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_hu.dll	GoogleUpdateSetup.exe
File created	C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_is.dll	GoogleUpdateSetup.exe

Executes dropped EXE 2 IoCs

pid	Process
2532	GoogleUpdateSetup.exe
1708	GoogleUpdate.exe

Loads dropped DLL 2 IoCs

pid	Process
1656	gcinst.exe
1708	GoogleUpdate.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	GoogleUpdate.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gcinst.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GoogleUpdateSetup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GoogleUpdate.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1708	GoogleUpdate.exe
1708	GoogleUpdate.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1708	GoogleUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1656 wrote to memory of 2532	1656	gcinst.exe	78
PID 1656 wrote to memory of 2532	1656	gcinst.exe	78
PID 1656 wrote to memory of 2532	1656	gcinst.exe	78
PID 2532 wrote to memory of 1708	2532	GoogleUpdateSetup.exe	79
PID 2532 wrote to memory of 1708	2532	GoogleUpdateSetup.exe	79
PID 2532 wrote to memory of 1708	2532	GoogleUpdateSetup.exe	79

C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\gcinst.exe
"C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\gcinst.exe"
1⤵
- Drops file in Program Files directory
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1656
- C:\Program Files (x86)\Google\GoogleUpdateSetup.exe
  GoogleUpdateSetup.exe /silent /alwayslaunchcmd /install "appguid={8A69D345-D564-463c-AFF1-A69D9E530F96}&appname=Google%20Chrome&needsadmin=True&brand=PNABB" /appargs "appguid={8A69D345-D564-463c-AFF1-A69D9E530F96}&installerdata=%7B%22distribution%22%3A%7B%22suppress_first_run_bubble%22%3Atrue%2C%22do_not_launch_chrome%22%3Atrue%2C%22make_chrome_default%22%3Atrue%7D%2C%22sync_promo%22%3A%7B%22show_on_first_run_allowed%22%3Afalse%7D%2C%22first_run_tabs%22%3A%5B%22chrome%3A%2F%2Fwelcome%22%2C%22https%3A%2F%2Fwww.google.com%22%5D%2C%22session%22%3A%7B%22restore_on_startup%22%3A4%2C%22startup_urls%22%3A%5B%22https%3A%2F%2Fwww.google.com%2F%22%5D%2C%22restore_on_startup_migrated%22%3Atrue%7D%7D"
  2⤵
  - Drops file in Windows directory
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2532
- - C:\Windows\SystemTemp\GUM926D.tmp\GoogleUpdate.exe
    C:\Windows\SystemTemp\GUM926D.tmp\GoogleUpdate.exe /silent /alwayslaunchcmd /install "appguid={8A69D345-D564-463c-AFF1-A69D9E530F96}&appname=Google%20Chrome&needsadmin=True&brand=PNABB" /appargs "appguid={8A69D345-D564-463c-AFF1-A69D9E530F96}&installerdata=%7B%22distribution%22%3A%7B%22suppress_first_run_bubble%22%3Atrue%2C%22do_not_launch_chrome%22%3Atrue%2C%22make_chrome_default%22%3Atrue%7D%2C%22sync_promo%22%3A%7B%22show_on_first_run_allowed%22%3Afalse%7D%2C%22first_run_tabs%22%3A%5B%22chrome%3A%2F%2Fwelcome%22%2C%22https%3A%2F%2Fwww.google.com%22%5D%2C%22session%22%3A%7B%22restore_on_startup%22%3A4%2C%22startup_urls%22%3A%5B%22https%3A%2F%2Fwww.google.com%2F%22%5D%2C%22restore_on_startup_migrated%22%3Atrue%7D%7D"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks whether UAC is enabled
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1708

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Google\GoogleUpdateSetup.exe

Filesize
1.3MB

MD5
88a857cb7ca6702ab812666b4c88dfe9

SHA1
6f97409352d52db138f3637bb5d5a6478e7de4d6

SHA256
027299ea8dfa96e0e59794c59abfd562e2f675e8b8b9a84028da8c58c58d243f

SHA512
6f3fc98f11286823db68d45709b845f14679fad1f64cdc0f0c3ef029c486fa551e57ca22d60ad902a865fbc0b246751b4d97edeffd1ef04a0ad190e71da2b6c1

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsk922F.tmp\System.dll

Filesize
11KB

MD5
fbe295e5a1acfbd0a6271898f885fe6a

SHA1
d6d205922e61635472efb13c2bb92c9ac6cb96da

SHA256
a1390a78533c47e55cc364e97af431117126d04a7faed49390210ea3e89dd0e1

SHA512
2cb596971e504eaf1ce8e3f09719ebfb3f6234cea5ca7b0d33ec7500832ff4b97ec2bbe15a1fbf7e6a5b02c59db824092b9562cd8991f4d027feab6fd3177b06

Download Submit
C:\Windows\SystemTemp\GUM926D.tmp\GoogleUpdate.exe

Filesize
158KB

MD5
baf0b64af9fceab44942506f3af21c87

SHA1
e78fb7c2db9c1b1f9949f4fcd4b23596c1372e05

SHA256
581edeca339bb8c5ebc1d0193ad77f5cafa329c5a9adf8f5299b1afabed6623b

SHA512
ee590e4d5ccdd1ab6131e19806ffd0c12731dd12cf7bfb562dd8f5896d84a88eb7901c6196c85a0b7d60aee28f8cfbba62f8438d501eabd1bb01ec0b4f8d8004

Download Submit
C:\Windows\SystemTemp\GUM926D.tmp\goopdate.dll

Filesize
1.9MB

MD5
9a7cd2cc8647d6052da0413a95777398

SHA1
3169d711b1e022af7912ca2a968be5fcaac04d23

SHA256
3244dd164b91b1db785b84438d54ea69051bc9e2a21bf523bd09bbe1005c3307

SHA512
64bf0ec909e33ad699c9c5d261dc739400db327b070e9faa19dfa12c637ad6d47e09126b262a04e7562c8939b6596e90b3353d27d7e1dc1eb2be5c9e6b462e6d

Download Submit
C:\Windows\SystemTemp\GUM926D.tmp\goopdateres_en.dll

Filesize
42KB

MD5
48f2d63b85468b3d9f6f5c99d2e20d87

SHA1
7fbe2e04a723473c9ed0090afd9ea279f03226a1

SHA256
713cd0392fd4a096560be8dcf5757adc6e02d919742a8ad7b4b0856e2ba53534

SHA512
815d55d0f6dd514134446f442b8972531c4dba6857b979ede7d5dc537c85eb027b3ca1c7f560aef90177a98e6a19661b937f06f1f209f19e8a2676271898afe1

Download Submit